An improved rotor shield construction for double break circuit breaker

摘要

The present invention provides a zone selective interlocking assembly for clearing fault(s) in circuit breaker (s) and method thereof. The zone selective interlocking assembly comprises: an upstream trip unit; a downstream trip unit. The upstream trip unit in co-ordination with the downstream trip unit having a zone selective interlocking (ZSI) trip signal with a failsafe sensitivity value for reducing the time to clear the fault in the circuit breaker, thereby enhancing the protection to the circuit breaker.